In principle a good, intriguing thriller, with nice paced shots. But horrible sound: whenever the actors speak there is loud background noise or music. Clearly a stylistic gag by the director, but makes understanding very difficult. Would profit by subtitles.
The film is worth seeing. But there are, besides some bad acting and some artificial, horribly written dialogues, particularly two things I dislike (but unfortunately often find in German productions): the insufficient sound design and the nonreflective use of music.